Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Oracle designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Oracle in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 22 | * or visit www.oracle.com if you need additional information or have any |
| 23 | * questions. |
| 24 | */ |
| 25 | |
| 26 | #include "jni.h" |
| 27 | #include "jni_util.h" |
| 28 | #include "jlong.h" |
| 29 | #include "jvm.h" |
| 30 | |
| 31 | #include "java_lang_Double.h" |
| 32 | |
| 33 | /* |
| 34 | * Find the double float corresponding to a given bit pattern |
| 35 | */ |
| 36 | JNIEXPORT jdouble JNICALL |
| 37 | Java_java_lang_Double_longBitsToDouble(JNIEnv *env, jclass unused, jlong v) |
| 38 | { |
| 39 | union { |
| 40 | jlong l; |
| 41 | double d; |
| 42 | } u; |
| 43 | jlong_to_jdouble_bits(&v); |
| 44 | u.l = v; |
| 45 | return (jdouble)u.d; |
| 46 | } |
| 47 | |
| 48 | /* |
| 49 | * Find the bit pattern corresponding to a given double float, NOT collapsing NaNs |
| 50 | */ |
| 51 | JNIEXPORT jlong JNICALL |
| 52 | Java_java_lang_Double_doubleToRawLongBits(JNIEnv *env, jclass unused, jdouble v) |
| 53 | { |
| 54 | union { |
| 55 | jlong l; |
| 56 | double d; |
| 57 | } u; |
| 58 | jdouble_to_jlong_bits(&v); |
| 59 | u.d = (double)v; |
| 60 | return u.l; |
| 61 | } |